Finding the Third Proportional to 7,618.78 and 12,166.17

Step by Step Solution

1. Step 1: Write the proportion equation
   7,618.78 : 12,166.17 = 12,166.17 : x
2. Step 2: Convert to fraction form
   7,618.78/12,166.17 = 12,166.17/x
3. Step 3: Cross multiply
   7,618.78x = 12,166.17 × 12,166.17
4. Step 4: Simplify right side
   7,618.78x = 148,015,738.09
5. Step 5: Solve for x
   x = 148,015,738.09/7,618.78
6. Step 6: Final answer
   x = 19,427.74